Talking-machine motor.



W; G. SHE'LTON.

TALKING MACHINE MOTOR.

' A PPLICAT,|0N FILED MAR. 1s. 1.918.

1,289,282, I Patented Dec. 31,1918.

Fa .j.

M INVENTOR @m 14% By Aiiorne ys, I

I WITNESS the said operation closing orrroia VJILLIAM GENTBY SHELI'ON,OF NEW YORK, H. Y.

Il'ALKING-MACHINE MOTGR.

Specification of Letters latent.

Patented Dec. 311, 11918.

Application filed March 16, 1918. Serial No. 222,833.

To aZZ whom it may concern:

Be it known that 1,. WILLIAM GENTRY SHELTON? a citizen of the UnitedStates of America, residing in the borough of Man hattan, city of NewYork, county .of New York, and State of New York, have invented certainnew and useful Improvements in Talkingdviachine Motors, of which the following is a specification.

lhis invention relates to improved electrical apparatus for operatingtalking machine reproducers' and has for an. object to provide means forautomatically stopping the motor and breaking the circuit thereof aftera predetermined amount of rotation is imparted to the record supportingdevice, and also to provide means for setting the cutting off mechanismat a predetermined point and by the circuit for starting the motor. y

In the drawings accompanying this application two modifications or? apracticable embodiment of my invention are illustrated, in whichdrawings Figure 1. shows a form of my improved apparatus. in elevation,a portion of the motor casing being broken away to show the relativeposition of the parts.

Fig. 2 is a horizontal section of Fig. 1, taken on a plane about theline 2--2, look ing downwardly Fig. 3 is a top view oi the motor showingthe permutation index.

Fig. 4 is a view somewhat similar to Fig. 1, showing a differentarrangement of? the reducing gear, and

Fig. 5 is a top view of the Fig. 4 construction.

In the constructional embodiment illustrated in Figs. 1, 2 and 3, a formoi motor casing is illustrated for resting upon some portion, preferablythe table of a talking machine. This casing is designated by thereference character 7. Within the casing is shown mounted the armature 8of an electric motor. The shaft 9 thereof being shown provided at itslower end with a friction pulley 10 for engaging the record support orturntable ll adapted to carry a record disk 12.

One of the objects of this invention is to provide means whereby theoperator upon starting the motor may set a' circuit breaker in positionto stop the motor and the rotation' of the record dish upon apredetermined amount oi rotation thereof, either switch.

based upon the diameter or" the disk itself, or

based upon such diameter rectified by the quantity of record carried bythe disk. To this end the armature'shaft 9 during its rotation of therecord support 11 also operates through the instrumentality of reductiongearing a circuit breaker. In the present illustration it is assumedthat the current is led intothe motor by means of a suitable cord 13 andthat such current passes tothe switch fingers 14 and 15, which are shownmounted. one above the other and properly insulated. The circuit isnormally closed by the engagement of such fingers one with the other,and is interrupted by the forcing of these fingers apart by a circuitbreaker formed of insulation material. Such current breaker beingillustrated at 16 in the form of an arm fast on a shaft 17 projectingabove the top plate 18 of the motor casing, other parts of the mechanismheretofore mentioned being located below such top plate. The outwardportion of the shaft 17 is shown having fast upon it a finger 19 adaptedto register with an index 20 suitably carried by the top plate. The endof the shaft 17 is' shown finished 0E by means of knurled head 21, forenabling the ready setting of the The upper end of the armature shaft 9is shown provided with a worm 21 meshingwith a worm wheel 22 fast on ashaft 23 supported in suitable bearings carried by the casing. A worm 24is formed on the shaft 23 and is shown meshing with a worm wheel 25,frictionally carried by the shaft 17. The reductions which I have founduseful in practice are approximately 10 to 1 between the pulley 10 andthe record support 11.. 30 to 1 between the worm 21 and the Worm wheel22, and 120 to 1 between the worm 24 and the worm wheel 25. This ofcourse is given merely by way of illustration for the purpose ofexplaining to the skilled workman the principle of operation of themechanism in the example shown in the drawings. 4 The index 20, as shownin Fig. 3, is provided with a point marked Ofif which indicates, whenthe finger 19 registers therewith, that the armature 16 is interposedbetween the switch fingers 14 and 15 and that the current is ofii. Theindex or dial 20 is also provided with points marked 6, l0 and 12,intended to correspond withrecord disks of sin, ten and twelve inchdiameters respectively, and located at. distancesapart,

it may be well to state that upon placing the record disk 12 on thesupport 11, the openator will, notice the diameter of the disk and takehold of the knurled head 21 and turn,

the pointer 19 until it registers with the d cation on the dialcorrespondmg with the diameter of the record. This movement not onlydetermines the amount of travel of the switch arm 16 before itinterrupts the cir- 'cuit, but also immediately closes such cir- 2o cultand starts the motor. After the operator becomes more skilful in gagingthe amount or quantity of record upon the disk,

he places the pointer either short of or beyond the point indicated forthe diameter" of the record which he is employing according as the diskcontains less ,or more record than is normal for that diameter. It isalso feasible for the operator to arrange the de vice so that it willinterrupt the circuit and stop the record at any intermediate point, sothat if he does not wish to have the end of the record reproduced, hemay set the device for stopping the motor wherever he wishes. It is, ofcourse, apparent that the reduction gearing immediately upon the settingof the switch arm 16 moves this toward the fingers 1 1, 15 and at thepredetermined point causes such arm 16 to interpose itself between suchfingers and interrupt the curto rent;

The eccentric relation of the dial 20 to I "the top plate 18 for certainclasses of trade is undesirable owing to its unsymmetrical appearanceThe form of mechanism illusformed concentrically upon th top plate 180and the shaft 170 in axia alinement with the armature shaft 90. Thereduction gear in this instance comprises a worm 210 220 fast on shaft230, such .shaft having a Worm meshing with a worm wheel 250 fast on ashaft 251, which shaft also has fast upon it a friction gear 252,engaging the periphery of a disk 253 fast on the shaft 170.

The insulation switcharm 160 is shown carried by the disk 253, theswitch fingers 14:0

and 150 in this instance being carried by the top plate 180 of thecasing. The index fing'er 190 is shown traversing a circle concentriowith the outline of the motor casing and the setting head 210 assymmetrically located thereon.

l'.n the Fig. 1 construction the necessary slipping of the parts insetting is permitted trated in Figs. i and 5 shows thediiil 200' on theshaft 90 meshing with a worm wheel naeaaea of illustration.

What I claim is 1. The combination with a talking-mathine recordturn-table, of an electric motor orfdriving the same, a sw1tch .forcontrollingthe motor circuit and embodying a settable member movable tovariable positions on starting, indicating means therefor, and reductiongearing between the motor shaft and such settable member.

2. The combination with a talking-machine record turn-table of anelectric motor for driving the same, a switch for controlling the motorcircuit and embodying a settable member and reduction gearing be tweenthe motor shaft and such settable able with the settable member.

3. A talking-machine motor comprising an electric motor having a pulleyfor driving the record of a talking-machine, a switch for the motorcircuit, a member adapted to open and close such switch, reductiongearing between the motor shaft and the said member, and means formoving the said member away from its circuit breaking posimember, adial, and an index pointer movtion-a predetermined distance forpermitting a predetermined amount of rotation ofthe said pulley.

4. A talking-machine motor comprising an electric motor, and meanscarried thereby for driving a talking-machine record, a

switch for the circuit of said motor com- 1 prising a pair of springfingers, an insulation armadapted for interposition, between saidfingers, a shaft carrying the switch arm, and reduction gearing betweenthe said shaft and the motor shaft, with a slipping connection betweenthe latter and said arm.

5. A talking-machine motor as set forth in claim 4 embodying a dial onthe motor casing and an index finger registering with such dial andcarried by the switch arm shaft.

6. A talking-machine motor comprising a motor casing, a motorconcentrically mounted therein, one end of the motor shaft beingprovided with a pulley for driving a talking-machine record, the otherend of said shaft being provided with a worm, a'switch for the circuitof said motor, comprising a pair of spring fingers normally inengagement, a shaft extending through the end of the casing, and inaxial alinement with the motor shaft, a train of reduction gearingaaaaea between thesaid switch shaft and the mo switch shaft forregistering with the dial tor shaft and embodying a slipping element,and indicating the position of the insulaan insulation arm fast with thesaid switch tion arm.

shaft and adapted for interposition between In Witness whereof, I havehereunto 5 the switch fingers, a dial concentrically dissigned my name.I

posed-0n the outside of the end of the 'casing, and an' index fingercarried by said WILLIAM GENTRY SHELTON.

